CAA NZ Basic Turbine Knowledge (Helicopter) Exam Practice Questions - CAA NZ Basic Turbine Knowledge (Helicopter) Exam (New Zealand) Exam

What is the main function of the reduction gearbox in a helicopter turboshaft engine?

Reduce high turbine output RPM to an acceptable input RPM for the main rotor transmission Increase engine shaft speed to boost tail rotor anti-torque efficiency Automatically decouple the gas producer spool from the compressor during autorotation Convert hydraulic pressure from the FCU into mechanical rotational torque

Correct Answer:

Reduce high turbine output RPM to an acceptable input RPM for the main rotor transmission

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